Re: Probably a simple answer...
| From: | Zeev Suraski | Date: | Tue, 14 May 2002 13:42:44 +0000 |
| Subject: | Re: Probably a simple answer... | ||
| References: | 1 | Groups: | php.dev |
| Request: | Send a blank email to php-dev+get-84038@lists.php.net to get a copy of this message | ||
zval strings must be NULL terminated, even if they contain binary data. The str.val.len property represents the length of the string w/o the terminating NULL.
Zeev
At 16:39 14/05/2002, Robert Cummings wrote:
brad lafountain wrote: Well i do believe that the zval string SHOULD be null termiated and have the length stored. You would think so, but on further thought, if that were the case you wouldn't be able to store compressed data from gzip in a string because the null bytes everywhere would interfere. Also, as I said, ZVAL_STRING suggests that this is so... since when you use it to set a zval container to a string it saves the length as strlen( passedString ), rather than strlen( passedString ) + 1, also the memcpy then uses this length to copy the string if you set the copy flag to true. Cheers, Rob. ------------------------------------------------------------------------ But zend does provied this api function zend_binary_zval_strcmp(zval *, zval*); - Brad --- Robert Cummings <robert.cummings@webmotion.com> wrote:zval containers that are of string type don't seem to hold a null terminating character, but rather directly store the length of the string - I note this because of how the ZVAL_STRING macro works... My question then is what is the best way to compare two strings in a zval? I would imagine a macro or function would already exist, and I'm quite sure that the following simple invocation is asking for trouble:__________________________________________________ Do You Yahoo!? LAUNCH - Your Yahoo! Music Experience http://launch.yahoo.com -- .-----------------. | Robert Cummings | :-----------------`----------------------------. | Webdeployer - Chief PHP and Java Programmer | :----------------------------------------------: | Mail : mailto:robert.cummings@webmotion.com |strcmp( Z_STRVAL_P( target1 ), Z_STRVAL_P( target2 ) ) == 0Thanks for any information. Cheers, Rob. -- .-----------------. | Robert Cummings | :-----------------`----------------------------. | Webdeployer - Chief PHP and Java Programmer | :----------------------------------------------: | Mail : mailto:robert.cummings@webmotion.com || Phone : (613) 731-4046 x.109 |:----------------------------------------------:| Website : http://www.webmotion.com | | Fax : (613) 260-9545 |`----------------------------------------------' -- PHP Development Mailing List <http://www.php.net/> To unsubscribe, visit: http://www.php.net/unsub.php| Phone : (613) 731-4046 x.109 |:----------------------------------------------:| Website : http://www.webmotion.com | | Fax : (613) 260-9545 |`----------------------------------------------' -- PHP Development Mailing List <http://www.php.net/> To unsubscribe, visit: http://www.php.net/unsub.php